Reliable and Economical Design As per IS 3624 of 1987 Nominal Sizes : 150 X 78 & 200 x 104 mm Applications : Draught gauges are used to measure the very low pressure of gas. They are an indispensable instrument for heat management including the control of boiler pressures and venting operation in the flue and the improvements of combustion efficiency. Usable as a Pressure gauge for instrument rooms